npt and nptf will it work?

[ramblin_on]

I purchased a tap today to install the pyro for my edge juice. The guy that sold me the tap said it is the same thread pattern. But I want to know for sure. The instructions call for a 1/8 NPT tap. The one I have is marked 1/8-27 NPTF. I have tried to research this by doing searches but can not find a answer.

 

[RJOL]

See if this helps...



http://www.cutting-tool-supply.com/TechTips/Tapping/NPTvsNPTF/NPTVsNPTF.htm



Should work fine, as it would prevent the probe fitting from going in too far and seal better, but someone else with more experience should chime in...

 

[MacHaggis]

How's the visual?

Don't know the textbook answer, but how does the thread on the tap compare visually with the thread on the fitting? The NPTs are pretty standard but have that funny bow to them, so a visual will have the potential for error but . . . The 27 would be threads per inch. Do you have a thread gauge you can throw on the fitting?

 

[ramblin_on]

Thanks

See if this helps...



http://www.cutting-tool-supply.com/TechTips/Tapping/NPTvsNPTF/NPTVsNPTF.htm



Should work fine, as it would prevent the probe fitting from going in too far and seal better, but someone else with more experience should chime in...

This site says,

It is acceptable to use NPTF taps for NPT applications but NPT taps cannot be used for NPTF applications.



Thanks thats what I needed to know.

 

[RGramlow]

This site says,

It is acceptable to use NPTF taps for NPT applications but NPT taps cannot be used for NPTF applications.

NPT stands fore NAtional Pipe Taper, NPTF stands for National Pipe Taper Fuel, I am pretty sure the threads are more pointy so they can seal up better so the fluid can not spiral its way out between the crest and the valley (not sure if thats the real names) of the thread you could say. Just a little FYI if you were wondering.

 

[RLutkenhaus]

NPT is a national pipe thread, usually requires some kind of filler for sealing. NPTF is a dry seal national pipe thread which the crests and roots of the threads interfere and deform to create the seal. Being that you are using this on the pyrometer, you really don't have to worry about anything. Just use what was given to you, install the pyro with a good copper or silver grade anti-seize, and go on.



Both are going to be noted as 1/8" - 27 NPT or 1/8" - 27 NPTF, meaning 1/8" pipe thread, 27 threads per inch, National Pipe Thread standard.